"More than a year after a Tennessee coal ash spill created one of the worst environmental disasters of its kind in United States history, the problem is seeping into several other states.
It began on Dec. 22, 2008, when a retaining pond burst at a coal-burning Tennessee Valley Authority power plant, spilling 5.4 million cubic yards of coal ash across 300 acres into the Emory River and an affluent shoreline community near Knoxville. It was enough ash to cover a square mile five feet deep.
While the T.V.A.'s cleanup has removed much of the ash from the river, the arsenic- and mercury-laced muck or its watery discharge has been moving by rail and truck through three states to at least six sites. Some of it may end up as far away as Louisiana.
At stops along the route, new environmental concerns are popping up."